RU94623U1 - MOISTURE DOUBLE-MOUNTED FITTINGS - Google Patents

Abstract

 Wellhead double-barrel fittings containing a lower crosspiece, a pipe holder, a special pipe holder, a tee for injection with a plug, a crosspiece for production with a non-return valve and bends, characterized in that the crosspiece for production is equipped with a flange or upper thread, internal or external, for installing a ground drive screw sucker rod pump.

Description

The utility model relates to the field of mechanical engineering, in particular, to wellhead fittings and can be used in the oil industry for strapping a wellhead equipped for simultaneous and separate production by a screw pump and pumping a working agent, and allows for well control, flushing and research.

The well-known "Wellhead fittings АУ 140х50" (analogue) for single-lift operation of wells by screw pumps, consisting of a body, pipe holder, tee and locking devices (passport 2173-00-00ПС ТАТ Тннетн-РБО »).

The disadvantage of wellhead valves is unsuitability for simultaneous and separate production by screw pumps and at the same time pumping a working agent into the well, because one tee with counterflange is used, which serves as the base of the ground drive.

It is known "Equipment of the wellhead with parallel suspension of pipes" (AS SU No. 375369, ЕВВ 33/03, publ. Bull. No. 16 of 03/23/1973), including the pipe holder of the first row of pipes, the pipe holder of the second row of pipes with flanges , a coil with flanges, a sealing nipple, while the upper flange of the coil is eccentric relative to the axis of the coil, and the lower flange of the pipe holder of the second row of pipes is eccentric relative to the axis of the holder of the second row of pipes.

The disadvantages of this device are:

firstly, high metal consumption and design complexity due to the large number of parts, which reduces the reliability of the entire device as a whole;

secondly, the complexity of tripping operations, since it is necessary to disconnect at least one of the flanges of one pipe holder for carrying out tripping operations even with one row of pipes attached to the pipe holders;

thirdly, the difficulty of connecting ground equipment to the device due to the small interaxial distance between the axes, limited by the inner diameter of the casing of the well and the diameter of the pipes in rows;

fourthly, unsuitability for simultaneous-separate production of wells by screw pumps, rotationally driven from a ground drive with simultaneous-separate injection of the working agent.

The well-known "Wellhead double-barrel fittings" (RF patent No. 2305747, ЕВВ 33/03, published on September 10, 2007), including a pipe holder of the first row of pipes with two channels, one of which is equipped with upper and lower threads, and a pipe holder of the second row of pipes with upper and lower threads. The specified reinforcement in technical essence is closer to the proposed wellhead double-barrel reinforcement, and it can be taken as a prototype.

A disadvantage of the known device is unsuitability for production of wells by screw rod pumps driven rotationally from a ground drive while simultaneously injecting a working agent.

The technical task of the claimed utility model is the use of wellhead double-barrel fittings as a wellhead strapping for producing formation fluid by a screw rod pump, rotationally driven from a ground drive and a working agent into the receiving wellbore.

The stated technical problem is solved by the described wellhead double-barrel fittings containing a lower crosspiece, a pipe holder, a special pipe holder, a tee for injection with a plug, a crosspiece for production with a non-return valve and bends.

What is new is that the mining cross is equipped with a flange or upper thread, internal or external, for installing a ground drive screw pump.

Figure 1-4 shows the upper part of the described wellhead double-barreled reinforcement (options), figure 5 presents the described wellhead double-barreled reinforcement in figure 1, a General view.

The double-barrel wellhead (Figs. 1-4) comprises a pipe holder 1, a special pipe holder 2, a crosspiece for extraction 3 with a branch 4 and a check valve 5, and also a tee for injection 6 with a plug 7 and a branch 8.

In the case of production along a long string of tubing 9, a crosspiece for production 3 is screwed into the pipe holder 1 (Figs. 1 and 3), and a tee for injection 6 is screwed into a special pipe holder 2.

In the case of production through a short string of tubing 10, a tee for injection 6 is screwed into the pipe holder 1 (Figs. 2 and 4), and a crosspiece for production 3 is screwed into a special pipe holder 2.

The crosspiece for mining 3 can be made with a flange 11 (Fig.1, 2 and 5) or with a top thread (external 12 or internal 13) (Fig.2 and 4) for mounting with a ground drive (not shown). The flange 11 can be connected to the crosspiece for the extraction of 3 detachable, one-piece or are made together as a single product.

The pipe holder 1 is connected to the lower crosspiece 14 (figure 5). The lower crosspiece 14 is used to connect the wellhead double-barrel fittings assembled with a thread 15 with a casing sleeve coupling (not shown in the figures) and sealing the annulus, and is equipped with bends 16 and 17.

Well double-barrel fittings works as follows.

The produced reservoir fluid (FIGS. 1 and 3) enters through a long string of tubing 9 and through a crosspiece for production 3 and branch 4 enters an oil pipeline (not shown). Through a branch 8 and a tee for injection 6, a working agent (water, steam, etc.) is supplied to a receiving formation of a well (not shown) through a short string of tubing 10 pipes.

The produced reservoir fluid (FIGS. 2 and 4) enters through a short string of tubing 10 and through a crosspiece for production 3 and branch 4 enters an oil pipeline (not shown). Through branch 8 and a tee for injection 6 along a long string of tubing 9, a working agent is supplied to the receiving wellbore (not shown).

Using the proposed technical solution allows the well to be operated using highly efficient methods, for example, installing a screw rod pump with a ground drive with simultaneous-separate injection according to the patent for utility model No. 84,461 dated February 06, 2009. "Installation for simultaneous-separate production and injection through one well" , by application No. 2009104091, IPC Е21В 43/14, author - A.A. Isaev. For information, graphic images of these installations are attached on 2 sheets in 3 copies.

Claims (1)

Wellhead double-barrel fittings containing a lower crosspiece, a pipe holder, a special pipe holder, a tee for injection with a plug, a crosspiece for production with a non-return valve and bends, characterized in that the crosspiece for production is equipped with a flange or upper thread, internal or external, for installing a ground drive screw sucker rod pump.